320556434223667 has 2 divisors, whose sum is σ = 320556434223668. Its totient is φ = 320556434223666.

The previous prime is 320556434223661. The next prime is 320556434223691. The reversal of 320556434223667 is 766322434655023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320556434223667 - 2¹⁵ = 320556434190899 is a prime.

It is not a weakly prime, because it can be changed into another prime (320556434223661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160278217111833 + 160278217111834.

It is an arithmetic number, because the mean of its divisors is an integer number (160278217111834).

Almost surely, 2^{320556434223667} is an apocalyptic number.

320556434223667 is a deficient number, since it is larger than the sum of its proper divisors (1).

320556434223667 is an equidigital number, since it uses as much as digits as its factorization.

320556434223667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 130636800, while the sum is 58.

The spelling of 320556434223667 in words is "three hundred twenty trillion, five hundred fifty-six billion, four hundred thirty-four million, two hundred twenty-three thousand, six hundred sixty-seven".